Mental math IQ question
Find the missing number
This missing-number puzzle tests whether you can find a changing gap pattern quickly.
Quick answer
Answer: 49
The gaps are 3, 6, 9, and 12. The next gap is 15, so 34 + 15 = 49.
How to solve it
1
Subtract each number from the next.
2
Write the gap sequence.
3
Notice the gaps increase by 3.
4
Add the next gap to the final number.
What this tests
Mental arithmetic
Pattern recognition
Working memory
Rule extension
IQFlow
Practice sequence reasoning
IQFlow uses multiple puzzle types so number sequences are only one part of your profile.